Add 56/42 and 21/90, Solve 1 14/42 + 21/90 as a fraction

Add 56/42 and 21/90

1^st number: 1 14/42, 2^nd number: 21/90

56/42 + 21/90 is 47/30.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 42 × 15 = 630,
56/42 = 56 × 15/42 × 15 = 840/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630
Add the two like fractions:
840/630 + 147/630 = 840 + 147/630 = 987/630
987/630 simplified gives 47/30
So, 56/42 + 21/90 = 47/30
In mixed form: 117/30

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